Some factors that may make it difficult to keep speed during a stairway evacuation are exhaustion or the person's mental state. During a period of evacuation, the stress suffered is going to affect how people are going to respond, and how they are going to react. Also, the architecture of the stairway may affect the stairway evacuation process.
It was designed to be <span>Peace with Honor</span>.
Old Major is the allegorical figure for Karl Marx or Vladimir Lenin, depending on your interpretation of the text. Both men stood for basically the same thing, and these things was what Orwell was exploring in the novel.